Estimating singularities with reassigned distributions

Sharply localized time-frequency and time-scale distributions can be obtained by means of a nonlinear technique referred to as reassignment. The basics of reassignment are recalled in the case of both spectrograms and scalograms (i.e., short-time Fourier and wavelet-based energy densities, respectively), with emphasis on their usefulness for characterizing isolated Holder singularities as well as oscillating singularities.